Please Solve these Problems

Consider a program that performs the following steps repeatedly: 1. Use the CPU for 4 milliseconds. 2. Issue in I/O to disk for 14 milliseconds. 3. Use the CPU for 10 milliseconds. 4. Issue an I/O to the network for 18 milliseconds Assume that each step depends on data obtained from the previous step. Also, assume that it takes 2 millisecond to erecute the device driver code for both the disk and the network at the beginning of the I/O. Answer the following questions (a) Draw 3 time-line diagrams (time on the x-axis and utilization on the y-axis) that illustrate the utilizations of the CPU, disk, and network over the execution of two iterations of the program above. [3 pts] (b) What are the average utilizations of the CPU, disk and network over these two iterations? [3 pts] (c & d) Assume that there are two processes of the program above running in a multiprogramming system (i.e., when a process blocks for I/O, another process can get the CPU), answer parts (a) and (b) for this case showing which part belong to which process. You can ignore the time spent in context switching. [6 pts